1utmpd(1M) System Administration Commands utmpd(1M)
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6 utmpd - utmpx monitoring daemon
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9 utmpd [-debug]
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13 The utmpd daemon monitors the /var/adm/utmpx file. See utmpx(4) (and
14 utmp(4) for historical information).
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17 utmpd receives requests from pututxline(3C) by way of a named pipe. It
18 maintains a table of processes and uses poll(2) on /proc files to
19 detect process termination. When utmpd detects that a process has ter‐
20 minated, it checks that the process has removed its utmpx entry from
21 /var/adm/utmpx. If the process' utmpx entry has not been removed, utmpd
22 removes the entry. By periodically scanning the /var/adm/utmpx file,
23 utmpd also monitors processes that are not in its table.
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26 -debug
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28 Run in debug mode, leaving the process connected to the controlling
29 terminal. Write debugging information to standard output.
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33 The following exit values are returned:
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35 0
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37 Successful completion.
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40 >0
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42 An error occurred.
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46 /etc/default/utmpd
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48 You can set default values for the flags listed below. For example:
49 SCAN_PERIOD=600
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51 SCAN_PERIOD
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53 The number of seconds that utmpd sleeps between checks of /proc
54 to see if monitored processes are still alive. The default is
55 300.
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58 MAX_FDS
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60 The maximum number of processes that utmpd attempts to monitor.
61 The default value is 4096.
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64 WTMPX_UPDATE_FREQ
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66 The number of seconds that utmpd sleeps between read accesses
67 of the wtmpx file. The wtmpx file's last access time is used by
68 init(1M) on reboot to determine when the operating system
69 became unavailable. The default is 60.
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73 /var/adm/utmpx
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75 File containing user and accounting information for commands such
76 as who(1), write(1), and login(1).
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79 /proc
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81 Directory containing files for processes whose utmpx entries are
82 being monitored.
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86 See attributes(5) for descriptions of the following attributes:
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91 ┌─────────────────────────────┬─────────────────────────────┐
92 │ ATTRIBUTE TYPE │ ATTRIBUTE VALUE │
93 ├─────────────────────────────┼─────────────────────────────┤
94 │Availability │SUNWcsu │
95 └─────────────────────────────┴─────────────────────────────┘
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98 svcs(1), init(1M), svcadm(1M), poll(2), pututxline(3C), proc(4),
99 utmp(4), utmpx(4), attributes(5), smf(5)
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102 If the filesystem holding /var/adm/wtmpx is mounted with options which
103 inhibit or defer access time updates, an unknown amount of error will
104 be introduced into the utmp DOWN_TIME record's timestamp in the event
105 of an uncontrolled shutdown (for example, a crash or loss of power ).
106 Controlled shutdowns will update the modify time of /var/adm/wtmpx,
107 which will be used on the next boot to determine when the previous
108 shutdown ocurred, regardless of access time deferral or inhibition.
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111 The utmpd service is managed by the service management facility,
112 smf(5), under the service identifier:
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114 svc:/system/utmp:default
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119 Administrative actions on this service, such as enabling, disabling, or
120 requesting restart, can be performed using svcadm(1M). The service's
121 status can be queried using the svcs(1) command.
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125SunOS 5.11 4 Jun 2008 utmpd(1M)